Juniper JUNOSE 11.1.X - COMMAND REFERENCE A TO M 4-9-2010, Справочник по командам

Страница: 326 / 1506

bgp dampening
Syntax
[ no ] bgp dampening [ halfLife [ reuse suppress maxSuppressTime
[ halfLifeUnreachable ] ] ] [ route-map mapTag ]
Release Information
Command introduced before JUNOSe Release 7.1.0.
Description
Enables BGP route dampening. The router assesses a penalty of 1000 each time a
route flaps and adds this to any previously accumulated penalty value. Penalties are
cumulative. The
no version disables route flap dampening.
Options
■
halfLife— Half-life period in minutes in the range 1–45; default value is 15. When
a BGP route has been assigned a penalty, the penalty is decreased by half after
the half-life period.
■
reuse— Reuse limit in the range 1–20000; default value is 750. As the penalty
for a flapping route decreases and falls below this reuse limit, the route is
unsuppressed. That is, the route is added back to the BGP table and used for
forwarding.
■
suppress— Suppress limit in the range 1–20000; default value is 2000. A route
is suppressed when its penalty exceeds this limit.
■
maxSuppressTime— Maximum suppression time in minutes in the range 1–255.
This value is the maximum amount of time a route can be suppressed. The
default value is four times the half-life value.
■
halfLifeUnreachable —Alternate half-life period in minutes for unreachable routes;
a number in the range 1–45. If this value is not specified, the same half-life period
is used for both reachable and unreachable routes.
■
route-map—Specifies that dampening can be applied to routes according to the
route map behavior. If the route map
permits a route, the route is subject to
dampening. If the route map denies a route, the route is not subject to dampening.
The route map can contain a no dampening clause that determines dampening
characteristics.
■
mapTag —Name of the route map; a string of up to 32 alphanumeric characters.
Mode
Address Family Configuration, Router Configuration
284 ■
bgp dampening
JUNOSe 11.1.x Command Reference Guide A to M